Linux/Android: Use once_cell::race::OnceBool.

Now lazy.rs is no longer needed.

Cargo.toml

@@ -15,7 +15,7 @@ exclude = [".*"]
 cfg-if = "1"
 once_cell = { version = "1.19.0", default-features = false, optional = true }
 
-[target.'cfg(all(target_arch = "x86_64", target_env = "sgx"))'.dependencies]
+[target.'cfg(any(target_os = "android", target_os = "linux", all(target_arch = "x86_64", target_env = "sgx")))'.dependencies]
 once_cell = { version = "1.19.0", default-features = false, features = ["race"] }
 
 # When built as part of libstd

src/lib.rs

@@ -216,7 +216,6 @@ use crate::util::{slice_as_uninit_mut, slice_assume_init_mut};
 use core::mem::MaybeUninit;
 
 mod error;
-mod lazy;
 mod util;
 // To prevent a breaking change when targets are added, we always export the
 // register_custom_getrandom macro, so old Custom RNG crates continue to build.

src/linux_android_with_fallback.rs

@@ -1,11 +1,12 @@
 //! Implementation for Linux / Android with `/dev/urandom` fallback
-use crate::{lazy::LazyBool, linux_android, use_file, util_libc::last_os_error, Error};
+use crate::{linux_android, use_file, util_libc::last_os_error, Error};
 use core::mem::MaybeUninit;
+use once_cell::race::OnceBool;
 
 pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
     // getrandom(2) was introduced in Linux 3.17
-    static HAS_GETRANDOM: LazyBool = LazyBool::new();
-    if HAS_GETRANDOM.unsync_init(is_getrandom_available) {
+    static HAS_GETRANDOM: OnceBool = OnceBool::new();
+    if HAS_GETRANDOM.get_or_init(is_getrandom_available) {
         linux_android::getrandom_inner(dest)
     } else {
         use_file::getrandom_inner(dest)